<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <!--<p>列表书籍</p>
    <ul>
        <li>JAVA</li>
        <li>LINUX</li>
        <li>PHP</li>
    </ul>-->
    <todo>
        <todo-title slot="todo-title" :title="title"></todo-title>
        <todo-items slot="todo-items" v-for="(item,index) in todoItems"
                    :item="item" :index="index" v-on:remove="removeItems(index)" :key="index"></todo-items>
    </todo>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.min.js"></script>
<script>
    //slot 插槽
    Vue.component("todo", {
        template: '<div>' +
            '<slot name="todo-title"></slot>' +
            '<ul>' +
            '<slot name="todo-items"></slot>' +
            '</ul>' +
            '</div>'
    });

    Vue.component("todo-title", {
        props: ['title'],
        template: '<div>{{title}}</div>'
    });

    Vue.component("todo-items", {
        props: ['item','index'],
        template: '<li>{{index}}---{{item}} <button @click="remove">删除</button></li>',
        methods: {
            remove: function (index) {
                this.$emit('remove',index);
            }
        }
    });

    var vm = new Vue({
        el: "#app",
        data: {
            title: "语言",
            todoItems: ["java", "Php", "Linux"]
        },
        methods: {
            removeItems: function (index) {
                this.todoItems.splice(index, 1);
            }
        }
    });
</script>
</body>
</html>
